diff --git a/configure b/configure
index 3aa6004424..1009a397e4 100755
--- a/configure
+++ b/configure
@@ -15327,13 +15327,6 @@ _ACEOF
 
 rm -f conftest*
 
-if ${ac_cv_func_setvbuf_reversed+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_func_setvbuf_reversed=no
-fi
-
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking return type of signal handlers" >&5
 $as_echo_n "checking return type of signal handlers... " >&6; }
 if ${ac_cv_type_signal+:} false; then :
diff --git a/configure.ac b/configure.ac
index 72a47e2d19..741c8c02bc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -687,7 +687,6 @@ AC_PROG_GCC_TRADITIONAL
 AC_FUNC_MEMCMP
 AC_FUNC_MMAP
 AC_FUNC_SELECT_ARGTYPES
-AC_FUNC_SETVBUF_REVERSED
 AC_TYPE_SIGNAL
 AC_FUNC_STAT
 AC_FUNC_STRCOLL